<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Document</title>
    <style>
  .big-font {
    font-size: 50px; /* 设置字体大小为24像素 */
  }
    </style>
</head>

<body>
<!-- 点击上传文件按钮 -->
<input type="file" value="file" class="big-font"></br>
</body>
</html>